Cheapest return flights from Denver to Keflavik in January from 486€

AirHint found the following cheapest return flights from Denver (DEN) to Keflavik (KEF) in January 2026 (see full year).

Return flights

18 Jan - 22 Jan Icelandair direct
12 Jan - 18 Jan Icelandair direct
17 Jan - 21 Jan Frontier Airlines
04 Jan - 17 Jan Icelandair direct
08 Jan - 11 Jan Southwest Airlines
01 Jan - 18 Jan Southwest Airlines

Also check the deals for one-way flights from Denver to Keflavik in January.

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